Miconia galdamesiae Kriebel & Almeda,

Kriebel, Ricardo & Almeda, Frank, 2013, Two new species of Miconia (Melastomataceae: Miconieae) from the cloud forests of Panama, Phytotaxa 134 (1), pp. 27-41: 28-31

publication ID

http://doi.org/ 10.11646/phytotaxa.134.1.2

persistent identifier

http://treatment.plazi.org/id/57230B55-4963-D74E-FF01-76D4FE64F868

treatment provided by

Felipe

scientific name

Miconia galdamesiae Kriebel & Almeda
status

sp. nov.

Miconia galdamesiae Kriebel & Almeda  sp. nov.

TYPE:— PANAMA. Chiriquí: Reserva Forestal de Fortuna. Sendero atrás de la estación del Smithsonian ( STRI)  , 1162 m, 8.734583 N, - 82.240083 W, 19 September 2011, R. Kriebel 5736 & J. Burke (holotype NY!, isotypes INB!, PMA!)  . Figs. 1–2View FIGURE 1View FIGURE 2.

Small trees 2.5–7 m tall with young stems orange–brown from the copious indument of asperous–headed hairs, nodal line barely evident. Petioles 0.8–4 cm. Leaf blades 4.5–20 × 2–10.5 cm, 3–5–plinerved, diverging from the midvein 0.5–6 cm above the base usually asymmetrically, elliptic–ovate to ovate, base obtuse to acute and usually oblique, apex acuminate, the margin denticulate, adaxially glabrous except for asperous–headed hairs on the main veins towards the base, somewhat thin and dark green when alive, abaxially densely pubescent on tertiary and higher order veins with asperous–headed orange–brown hairs and glabrous to glabrescent on the actual surface. Inflorescences terminal, lax dichasia branched at or near the base of the inflorescence, 3.7–7 cm long, copiously covered with orange–brown asperous–headed hairs, bracts to 8 mm long, linear oblong, bracteoles 0.5–1 mm long, linear, less pubescent than rest of inflorescence rachis, drying pinkish, flowers clustered at the end of the inflorescence branches. Pedicels essentially absent. Hypanthia campanulate 1.25–1.75 × 1–1.5 mm, densely covered with asperous–headed hairs. Flowers 5– merous. Calyx fused in bud, shortly apiculate and less pubescent than the hypanthium, rupturing at anthesis into irregular, broadly rounded hyaline lobes 0.25–0.75 mm long and 0.5–0.75 mm wide at the base, the exterior calyx teeth 0.25–0.5 mm long, linear oblong, the calyx tube 0.25–0.5 mm long. Petals 1.5–2 x 1–1.5 mm, ovate, white, smooth, reflexed at anthesis, emarginate. Stamens 10, 3– 3.5 mm long, radially arranged around the style; filaments 1.5–2 mm long, geniculate near the apex, translucent white; anthers 1–1.5 × 0.35– 0.65 mm, linear–oblong, somewhat laterally compressed, cream yellow, pores 0.1–0.15 mm wide, truncate to somewhat ventrally inclined. Ovaries 5–locular, half inferior, apex elevated into a low papillose collar. Styles 4.5–4.75 mm long, straight to very slightly curved, distance between the anther apex and the stigma ca. 1 mm; stigmas truncate to capitellate, ca. 0.5 mm wide. Berries described as green–red on one label (McPherson 8410, CAS) but drying purple, 1.7–1.9 × 2.0– 2.2 mm when dry; seeds ovoid and angled, 0.4–0.5 × 0.3–0.4 mm, orange–brown, lateral symmetrical plane ovate to triangular, the highest point toward the chalazal side, antiraphal symmetrical plane ovate–triangular and inconspicuously verruculose on the angles, raphal zone narrowly triangular and extending the length of the seed, expanded into an appendage that covers about 30% of the seed length. Chromosome number: n = 17 (reported as M. aff. friedmaniorum  in Almeda 2013).

Distribution— Miconia galdamesiae  is known from two cloud forest localities in Panama, one in Chiriquí / Bocas del Toro Provinces and one in Veraguas Province in an elevation range from 860–1350 m.

Phenology— Specimens of Miconia galdamesiae  have been collected in flower in January through March, August and September, and with fruit in February and September.

Etymology— It is with great pleasure that we name this species for our colleague, Carmen Galdames, botanist at the Smithsonian Tropical Research Institute who has made many important collections of Melastomataceae  and the Panamanian flora in general.

Discussion— Miconia galdamesiae  belongs to a group of small tree species that appear to be restricted to the cloud forests of Costa Rica and Panama. Based on molecular phylogenetic data (Kriebel & Michelangeli in prep.) M. galdamesiae  groups in a well supported clade that includes M. friedmaniorum  , M. papillopetala  , and M. pendula Umaña & Almeda (1993: 5)  . These species share a similar indument of roughened trichomes, leaves that are typically asymmetrically plinerved with the main veins diverging from the mid vein in alternate fashion, small flowers with a fused calyx that ruptures prior to anthesis, filaments that are geniculate just below the anther thecae, five-locular ovaries, very exserted styles and seeds that are more or less ovoidtriangular in outline and angulate on the antiraphal surface with or without verruculose ornamentation that is restricted to the angle ridges. Miconia galdamesiae  can be distinguished from both Miconia pendula  and M. friedmaniorum  by its ovate petals (vs. linear-oblong petals). Also, M. galdamesiae  has sessile flowers in glomerules and exhibits a ‘big bang’ flowering strategy ( Fig. 1View FIGURE 1), whereas the other two species have inflorescences in which few flowers appear to open at a time, and the flowers are pedicellate and not arranged in glomerules. The stamens of M. galdamesiae  are declined away from the style at anthesis unlike M. pendula  (see Almeda & Umaña 1993, for a drawing of M. pendula  ) and M. friedmaniorum  ( Figs. 5–6View FIGURE 5View FIGURE 6) where the stamens are held tightly around the style at anthesis ( Figs. 1–4View FIGURE 1View FIGURE 2View FIGURE 3View FIGURE 4). Miconia pendula  also differs in its lanate indument and both M. pendula  and M. friedmaniorum  differ from M. galdamesiae  in their deflexed inflorescences. Continuing botanical exploration in southern Central America suggests that M. friedmaniorum  and M. pendula  are restricted to Costa Rica as suspected when they were described whereas M. galdamesiae  and M. papillopetala  are endemic to Panama. Miconia galdamesiae  is also similar to and grows sympatrically with M. papillopetala  on Cerro Tute (= Cerro Mariposa) in Veraguas Province. The two Panamanian species can be distinguished by petal color and indument details on upper cauline internodes, the inflorescence axes and the leaves (see Table 1 and Figs. 3View FIGURE 3 & 4View FIGURE 4). See discussion under M. papillopetala  below for further comments.

Another close relative of the above discussed taxa is Miconia brenesii  which has a broader distribution that may ultimately extend to Panama. This species can be distinguished from M. galdamesiae  by its young branches that appear glabrous or with very short roughened hairs, pedicellate, unclustered flowers, a calyx that is not fused prior to anthesis and very broad anther pores that are typically bent backwards toward the dorsal side of the anther ( Figs. 7View FIGURE 7 & 8View FIGURE 8).

Representative Specimens Examined— PANAMÁ. Bocas del Toro: Fortuna Dam Area , along continental divide trail bordering Chiriquí Province, 1200–1300 m, 08º45’04”N, 82º15’04”W, 10 March 1988, FGoogleMaps  . Almeda et al. 6059 ( BM, BR, CAS, GH, MEXU, MO, NY, PMA, P, US); Fortuna Dam region , near trail along continental divide, 11 February 1986, 1250– 1300 m, ca. 8º45’N, 82º15’W, GGoogleMaps  . McPherson 8410 ( CAS, MO, PMA); Vicinity of Fortuna Dam, along continental divide trail west of highway, 1250 m, 08°45’N, 82°15’W, 5 September 1987, McPherson 11636 ( CAS, MO, PMA). Coclé: Cerro Tigrero , 1000– 1350 m, 8°37’33”N, 80°41’18”W, 26–28 September 2001, JGoogleMaps  . Mendieta 17-466 ( CAS, PMA). Veraguas: Trail to Reserva Biológica Serrania de Tute and the summit of Cerro Tute about 0.7 km beyond the Escuela Agricola Rio Piedra just outside Santa Fe , 18 February 1996, 860– 1300 m, F  . Almeda et al. 7618 ( CAS, INB, MO, NY, PMA, US); Vicinity of Escuela Agricola, Alto de Piedra near Santa Fe. 3 mi beyond the fork in the road near the school, toward Atlantic slope along trail to top of Cerro Tute , 26 January 1980, 3400–3800 ft., T  . Antonio 3501 ( CAS, MO, PMA); puente sobre río Los Valles, cerca de la hidrolectrica Estrella Los Valles , 28 August 1982, M  . D. Correa et al. 4341 ( CAS, PMA); Cerro Tute ridge up from former Escuela Agricola, Santa Fe , 1000–1300 m, 8°05’W, 8°35’N, 20 February 1983, CGoogleMaps  . Hamilton & R  . Dressler 3073 ( CAS, EAP, INB, MEXU, MO, PMA)  .

STRI

Smithsonian Tropical Research Institute

R

Departamento de Geologia, Universidad de Chile

J

University of the Witwatersrand

NY

William and Lynda Steere Herbarium of the New York Botanical Garden

INB

Instituto Nacional de Biodiversidad

PMA

Provincial Museum of Alberta

CAS

California Academy of Sciences

F

Field Museum of Natural History, Botany Department

BM

Bristol Museum

BR

Embrapa Agrobiology Diazothrophic Microbial Culture Collection

GH

Harvard University - Gray Herbarium

MEXU

Universidad Nacional Autónoma de México

MO

Missouri Botanical Garden

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

G

Conservatoire et Jardin botaniques de la Ville de Genève

T

Tavera, Department of Geology and Geophysics

M

Botanische Staatssammlung München

C

University of Copenhagen

EAP

Escuela Agrícola Panamericana